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FOUNDATIONS FOR WIND TURBINES

FOUNDATIONS FOR wind TURBINES ENGR 340 Fall 2011 Jeramy C. Ashlock Assistant Professor, CCEE Vern Schaefer Professor, CCEE OUTLINE Topics Lecture # Design requirements, Foundation types 1 Overview of geotechnical engineering Soil mechanics Site investigations In-situ tests Laboratory tests 1 & 2 FOUNDATIONS for wind TURBINES , Design example 2 2 turbine FOUNDATION LOADS Vertical, shear forces and significant overturning moments are transmitted to foundation by tower Must be resisted within tolerances for foundation settlement and tilt Manufacturers typically specify horizontal and rotational foundation stiffness criteria Loading direction changes with wind direction and nacelle orientation Circular foundation shape is therefore opti

wind turbines, but rather to produce a selection of standard wind turbines. The task is then to choose a standard wind turbine from this selection and verify that it is suitable for a given location. The tower and the foundation may still be site-

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